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//! Iterate a digraph's arcs.
//!
//! # Examples
//!
//! ```
//! use graaf::{
//! AdjacencyList,
//! Arcs,
//! Circuit,
//! };
//!
//! let digraph = AdjacencyList::circuit(3);
//!
//! assert!(digraph.arcs().eq([(0, 1), (1, 2), (2, 0)]));
//! ```
/// Digraph arcs
pub trait Arcs {
/// Iterate the digraph's arcs.
///
/// # Examples
///
/// ```
/// use graaf::{
/// AdjacencyList,
/// Arcs,
/// Circuit,
/// };
///
/// let digraph = AdjacencyList::circuit(3);
///
/// assert!(digraph.arcs().eq([(0, 1), (1, 2), (2, 0)]));
/// ```
#[must_use]
fn arcs(&self) -> impl Iterator<Item = (usize, usize)>;
}
/// `Arcs` tests
#[macro_export]
macro_rules! test_arcs {
($fixture:path) => {
use $fixture::{
bang_jensen_34,
bang_jensen_94,
bang_jensen_196,
kattis_builddeps,
kattis_cantinaofbabel_1,
kattis_cantinaofbabel_2,
kattis_escapewallmaria_1,
kattis_escapewallmaria_2,
kattis_escapewallmaria_3,
};
#[test]
fn arcs_bang_jensen_196() {
assert!(bang_jensen_196().arcs().eq(vec![
(0, 1),
(0, 4),
(0, 7),
(1, 0),
(1, 2),
(1, 7),
(2, 3),
(3, 2),
(3, 4),
(4, 2),
(5, 6),
(6, 7),
(7, 5)
]));
}
#[test]
fn arcs_bang_jensen_34() {
assert!(bang_jensen_34().arcs().eq(vec![
(0, 4),
(1, 0),
(2, 1),
(2, 3),
(2, 5),
(5, 4)
]));
}
#[test]
fn arcs_bang_jensen_94() {
assert!(bang_jensen_94().arcs().eq(vec![
(0, 1),
(0, 2),
(1, 3),
(2, 1),
(2, 3),
(2, 4),
(2, 5),
(3, 5),
(4, 6)
]));
}
#[test]
fn arcs_kattis_builddeps() {
assert!(kattis_builddeps().arcs().eq(vec![
(0, 3),
(0, 4),
(2, 3),
(2, 4),
(2, 5),
(3, 1),
(4, 1),
(5, 1)
]));
}
#[test]
fn arcs_kattis_cantinaofbabel_1() {
assert!(kattis_cantinaofbabel_1().arcs().eq(vec![
(0, 1),
(1, 0),
(1, 2),
(1, 4),
(2, 1),
(3, 2),
(3, 4),
(3, 5),
(3, 7),
(3, 10),
(3, 11),
(4, 3),
(5, 6),
(6, 5),
(6, 10),
(7, 3),
(8, 7),
(8, 10),
(9, 7),
(9, 11),
(10, 6),
(11, 9)
]));
}
#[test]
fn arcs_kattis_cantinaofbabel_2() {
assert!(kattis_cantinaofbabel_2().arcs().eq(vec![
(0, 1),
(1, 0),
(1, 7),
(2, 0),
(2, 5),
(2, 7),
(3, 4),
(4, 3),
(5, 3),
(5, 6),
(6, 5),
(7, 2),
(8, 7),
(8, 9),
(8, 11),
(9, 8),
(10, 9),
(10, 11),
(11, 10)
]));
}
#[test]
fn arcs_kattis_escapewallmaria_1() {
assert!(kattis_escapewallmaria_1().arcs().eq(vec![
(5, 6),
(5, 9),
(6, 5),
(9, 5),
(9, 13),
(13, 9),
(13, 12)
]));
}
#[test]
fn arcs_kattis_escapewallmaria_2() {
assert!(kattis_escapewallmaria_2().arcs().eq(vec![
(5, 6),
(5, 9),
(6, 5),
(9, 5),
(12, 13),
(13, 9),
(13, 12)
]));
}
#[test]
fn arcs_kattis_escapewallmaria_3() {
assert!(kattis_escapewallmaria_3().arcs().eq(vec![
(1, 2),
(1, 5),
(2, 1),
(2, 6),
(5, 1),
(5, 6),
(5, 9),
(6, 2),
(6, 5),
(9, 5),
(9, 13),
(12, 13),
(13, 9),
(13, 12)
]));
}
};
}